The effect of residual stresses induced by prestraining on fatigue life of notched specimens

SADELER R., Ozel A., KAYMAZ L., TOTIK Y.

JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE, vol.14, no.3, pp.351-355, 2005 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 14 Issue: 3
  • Publication Date: 2005
  • Doi Number: 10.1361/10599490523995
  • Journal Name: JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.351-355
  • Keywords: finite-element analysis, prestraining, residual stress, rotating bending fatigue, CRACK-GROWTH, BEHAVIOR
  • Erzincan Binali Yildirim University Affiliated: No

Abstract

The effect of tensile prestraining-induced residual stress on the fatigue life of notched steel parts was investigated. The study was performed on AISI 4140 steel. Rotating bending fatigue tests were carried out on semicircular notched specimens with different notch radii in the as-quenched and tempered conditions. Metallography of the specimens was performed by means of light optical microscopy. The finite-element method was used to evaluate the residual stress distribution near the notch region. Fatigue tests revealed fatigue life improvement for notched specimens, which changes depending on the notch radii and applied stress. Scanning electron microscopy was used to examine the fracture surfaces of the specimens.